I've noticed in my travels that most markers erected by the state (vs local townships or organizations) were erected during or before the year 1932. In my curiosity of such, I searched around the web and found this...

“There’s an inconsequentiality to our lives that living in the wilderness shows up. Mountain are real, they set their limits, they set ours. They expose us, make us vulnerable and strong at the same time. “ --Alison Wat